ICD-10 Code M05.811 – Other rheumatoid arthritis with rheumatoid factor of right shoulder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.811 – Other rheumatoid arthritis with rheumatoid factor of right shoulder
What it is
This code identifies rheumatoid arthritis with rheumatoid factor involvement in the right shoulder, but not a more specific rheumatoid arthritis subtype. Use it when documentation names the right shoulder as the affected site and confirms rheumatoid factor positivity.
Clinical signs
Typical findings include inflammatory joint pain, stiffness, swelling, and reduced shoulder motion. Clinical features vary; refer to documentation, especially when the record links rheumatoid factor-positive disease to the right shoulder.
When to use this code
Use this code when the provider documents rheumatoid arthritis with rheumatoid factor affecting the right shoulder and no more specific code is stated. It is appropriate for encounters focused on that joint involvement, including chronic disease follow-up or assessment of persistent shoulder inflammation. Check documentation if the laterality or rheumatoid factor status is unclear.
Do not use for
Do not use it for shoulder pain, osteoarthritis, or rheumatoid arthritis without rheumatoid factor documentation. Also avoid it when the affected side is not the right shoulder or when a more specific rheumatoid arthritis code applies.
Coding tip
Confirm both the rheumatoid factor association and right-side shoulder involvement in the provider note before assigning M05.811.